Scale.



J. D. BURKHOLDER.

SCALE.

APPLICATION FILED NOV. 2, 1910.

I 1,096,096. Patented May 12, 1914 WITNESSES HIVGVE OR W Au y COLUMBIAPLANOGRAPH KID-WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

JOHN D. BURKHOLDER, 0F LANCASTER, PENNSYLVANIA, ASSIGNOR TO TOLEDO SCALECOMPANY, OF TOLEDO, OHIO, A

SCALE.

CORPORATION OF NEW JERSEY.

Patented May 12, 191-1.

Application filed November 2, 1910. Serial No. 590,351.

To all "whom it may concern .7

Be it known that I, JOHN D. BURKIIOLDER, a citizen of the United Statesof America, and resident of Lancaster, in the county of Lancaster andState of Pennsylvania, have invented certain new and useful Improvementsin Scales, of which the following is a specification.

This invention relates to automatic or computing scales and moreparticularly to that class of such devices in which an indicator handmoves over the face of a chart bearing numerals indicating the weight ofthe article being weighed and also the values at certain prices perpound. It will be apparent, however, that my invention is not limited tosuch scales but, with certain modifications, may be applied to a Varietyof kindred devices.

Referring now to the drawings forming a part of this application, Figure1 shows a scale in longitudinal vertical section with the working partshowever shown in elevation; Fig. 2 is a fragmentary view in plan of thetare devices and Fig. 3 is a central vertical section through the barrelof a dash pot employed in connection with my improved scale.

he particular embodiment of my invention shown in the drawings will nowbe described in detail but it is to be understood that it is merelyillustrative of the invention which is not limited to any of thecletails therein shown except so far as they may be specified in thefollowing claims.

A cast metal base A supports at one end an irregular shaped housing Gfor the indicator and counterbalance mechanisms and near the other end astandard B which carries the fulcra or supports B for the beam C. Thelatter may be and preferably is of cast metal and formed at itsleft-hand end into a single arm or blade but at its right-hand end intoan open frame of considerable breadth which bears at opposite sides theknife edges C which rest upon the supports formed on the standard B.Opon one side of the beam knife edges and at a short distance therefromthe beam is provided with upwardly directed knife edges C which receivethe bearings on the spider H of the platform H. Upon the opposite sideof the fulcra from that which supports the platform the beam is extendedcentrally in T form and between the outer ends of the T frame and theopen frame heretofore referred to extend a pair of tare beams C disposedsymmetrically upon opposite sides of the beam; tare weights 0* cooperatewith these tare beams in the usual manner. At its left-hand end the beamC extends into the housing G, an opening Gr eing formed therein for thepurpose and to permit ample movement of the weighing beam. Vithin thehousing a pair of bridges extend from one edge of the housing to theother, but one of the brid -e pieces, however, being shown in thedrawing, and serve as a support for the operating parts which arepivoted thereto.

The indicator arm K is mounted upon a hub E which is pivoted upon knifeedges resting upon supports upon the bridge pieces J The indicator handor finger K may be of any suitable or desired form but is shown asconsisting of a flat strip supporting in alinement and paralleltherewith a reading wire K. The indicator is connected to the beam bymeans of a flexible strap E attached at one end to the beam C by meansof a stirrup E engaging a knife edge upon the beam. The flexible strap Epasses over and around the hub E to which it is secured as by a screw 6and carries at its other end a. weight F depending through an opening Aformed in the base for this purpose. The weight F exerts a liftingeffect upon the elongated end of the beam C and to this extent aids incounterbalancing the weight of the platform H. The tare weights C* alsoassist in this result and thereby to gether with their service as tareweights perform a double function. The lifting effect of the weight Fhowever has the very substantial advantage that it serves to relieverather than to increase the weight sup ported by the fulcrum knives ofthe lever whereby the scale is made more sensitive and the life of theknives is prolonged. The weight F is formed at its lower end with acollar F by which the auxiliary weight F may be supported if desired toincrease the weighing capacity of the scales The variable ordifferential pendulum counterpoise which is employed comprises a hub Dcarrying suitable knife edges which are supported upon the bridges J anda pendulum weight D connected to the hub by a curved body member (Z thecurve of which is necessary to escape contact with the hub E of theindicator mechanism. The pendulum is connected to the beam at its outerend by means of a usual eccentric quadrant D flexible strap 1) andstirrup (Z. It will thus be seen that I have provided a scale in whichthe pendulum counterbalance is mounted independently of the indicatorarm so that the knife edges of the latter are re lieved of the weight ofthe pendulum and any tendency to lateral displacement thereby and thependulum. mechanism may be readily removed or repaired withoutdisturbing the indicator mechanism.

At 1 I have shown a dash pot mounted upon the ba e A and having itsplunger connected by the rod 10 to the scale beam. For the purpose ofthis application the precise construction of the dash pot immaterial but.it is shown in section in Fig. 3 and may be briefly described asfollows: Within the barrel 1, which may contain oil or similar fluid,the plunger rod 10 carries the hollow plunger 2 having the upper andlower walls 3-4: provided with apertures 5-'\3 near the peripheriesthereof and apertures 7-S near the center. Upon the plunger rod isadjustably mounted a collar 9 which is caused to approach or recede fromthe opening 78 to control the passage of liquid therethrough and withinthe plunger head is mounted a flexible plate 11 which is adapted to beflexed by the rush of liquid to close or partially close the openings or6 depending upon the direction in which impulse given to the plunger.Thus, if a violent impulse downward is given, the flexible plate tendsto close the openings in the upper face of the plunger and if theimpulse is in the opposite direction the plate tends to close theopenings in the lower face of the plunger. Thus, the dash pot serves tocheck any violent movement of the beam. The platform H has the usualcheck link mechanism X and X concealed within the base of the scale.

I claim:

1. In a weighing apparatus, the combination of a price computing tablethaving graduations thereon, an indicator movable over the face of thetablet, said indicator having a hub with trunnions thereon, means forsupporting the trunnions, a scale lever, a flexible member connected tothe lever and extending from the hub of the indicator, and a changeableweight on the flexible member.

In a weighing apparatus, the combination of a price computing tablethaving graduations thereon, an indicator movable over the face of thetablet, said indicator having a hub with trunnions thereon, means forsuppr'irting the trunnions, a scale lover, a flexible member connectedto the lever and extending from the hub of the indicator, a l

changeable weight on the flexible member, and a dash pot-for limitingthe movement of the lever.

3. In a weighing apparatus, the combination of a price computing tablethaving graduations thereon, an indicator movable over the face of thetablet, said indicator having a hub with trunnions thereon, means forsupporting the trui'mions, a scale lever, a flexible member connected tothe lever and extending. from the hub of the indicator, a changeableweight on the flexible member, and an oscillatory arm connected to saidlever.

4:. In a weighing apparatus, the combination of a price computing tablethaving grzuluations thereon, an indicator movable over the face of thetablet, said indicator having a hub with trunnions, a scale lover, a.flexible member connected to the lever and extending from the hub of theindicator, a. changeable weight on the flexible member, an oscillatoryarm connected to said lever, and a dash pot connected to said lever.

In a weighing zqiparatus, a platform support having duplicate bearings,a scale lever having duplicate trunnions adapted for pivotal support inthe aforesaid bearings, tare beams on each side of said lever, poises onsaid beams, a commodity holding member pivotally supported on saidlever, an oscil lating weighing member connected to .aid lever, anoscillating indicating member flexibly connected to said lever betweenits piv otal supports, and the aforesaid weighing members connected withthe same, a graduated chart coacting with said indicating member, aweight flexibly connected to said indicating member, an extra capacityweight adapted for intermittent connection to aforesaid indicatorweight, and a dash pot connected to said lever.

(3. In a device of the class described, a main beam G pivoted near oneend and carrying the scale pan adjacent its pivotal point but on thelong arm of the beam, a pendulum D, an eccentric segment D rigid withthe pendulum, a strap 1) cooperating with the segment and connected tothe beam, an indicator chart, an indicator hand K cooperating with thechart, a hub E upon the indicator hand and a strap E connected.v at oneend to the beam passing around the hub and secured to a weight at theother end, and a dash-pot for reducing the vibration of the beam.

In testimony whereof, l: hereunto allix my signature in the presence oftwo witnesses.

JOHN l). BUR (HOLDER.

iVi tnesses Guns. E. Leno,

W. J. h'lrjxonn.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

